Improvement in rotary churns



E. A. H EW l TT.

Rotary Ghurns.

Patent-ed July 29,1873.

" TA-TES FLISHA A. HEWITT, OF GROTON, CONNECTICUT.

IMPROVEMENT IN ROTARY CHURNS.

Specication forming part of Letters Patent No. 141,34, dated July 29,1873; application tiled February 12, 1873.

' To all whom 'at may concern:

i of Groton, in the county of New London and State of Connecticut, have invented a new Improvement in Churns 5 and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute a part of this specification, and represent, in-

Figure 1, an end view; Fig. 2, a top view open; Fig. 3, a transverse section on line a' w; Fig. 4., a transverse section on liney y, looking toward the end and in Fig. 5, a longitudinal section on linezz, showing the inner surface of one side.

This invention relates to an improvement in that class ot' churns which have beaters arran ged upon a revolving-shaft; and it consists incombining with the horizontal revolving shaft and radial beaters or arms longitudinally-projeeting ribs upon opposite sides of the shaft, and diagonal ribs upon opposite sides of the churn, all as more fully hereinafter described.

A is the body or box of the churn, in sub stantially the usual form, made semicircular upon the bottom, and provided with a shaft, B, through the center, from which radiate the several beaters C. Upon the end ofthe churn the driving-wheel D is arranged, constructed with internal teeth working in a pinion, E, upon the shaft B, in order to multiply the revolutions of the shaft in substantially the usual manner. On this end of the churn a cylinder, F, is arranged, within which a valve-piston is attached to a rod, G, and this rod is worked by an eccentric, II, on the driving-shaft, as denoted in broken lines, Fig. 1. From the cylinder F a tube, L, leads to the inside and turns down, as seenin Figs. 2 and 4, so that as the. shat't revolves the piston is worked, each revolution collecting andforcin g air into the churn for the purpose ot' facilitating the process ot' churning. On opposite sides of the churn are arranged two ribs, N N, on one side, and M M on the other side, as seen in Fig. 3 and in broken lines, Fig. 5, the ribs N running from the center near the top down toward each end,

is turned toward each end, thus carrying the cream from the center toward the ends on one side, and as the mass on the opposite side is thrown up against the ribs'M it is turned by them and thrown toward the center.

In this class of ehurns it is well known that a difficulty occurs in consequence of the thickenin g cream or partially-formed butter adherin gto the shaft and revolving with it, the centrifugal force at the shaft not being sntticient to throw the cream from the shaft. To over come this difficulty Iform upon opposite sides ofthe shaft a rib, I), curved upon the advancing side and dat, or nearly so, uponthe opposite side, as seen in Fig. 3, giving to t-he shaft in transverse section a. cam-shape or irregular form, the result of which is that the cream striking the shaft works rapidly out to the edge of these ribs and is there thrown out.

I claim as my invention- The combination of the arms C radiating from the shaft, the projecting ribs l? upon opposite sides of the said shaft and in the relative position to the arms described, with diagonal ribs or abutments M N upon opposite sides ofthe churn, the angles of the said ribs M upon one side being the reverse ot' the angles of the ribs on the opposite side, all substantiall y as described.

ELISHA A. HEWITT.

Witnesses:

W. P. BENJAMIN, T. M. WALLER. 

